Hi, I'm writing in the hope that somebody is familiour with the NAudio library , and can tell me how to change instrument on a channel. I kept trying like this, but didn't work out... midiout.Send(new PatchChangeEvent(0,1,30).GetAsShortMessage()); midiout.Send(new NoteOnEvent(0, 1, 0, 127, 100).GetAsShortMessage()); Thanks!